155399652 has 72 divisors (see below), whose sum is σ = 429391872. Its totient is φ = 47174400.

The previous prime is 155399641. The next prime is 155399653. The reversal of 155399652 is 256993551.

155399652 is a `hidden beast` number, since 1 + 553 + 9 + 96 + 5 + 2 = 666.

It is a super-2 number, since 2×155399652² = 48298103683442208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155399598 and 155399607.

It is not an unprimeable number, because it can be changed into a prime (155399653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14877 + ... + 23067.

It is an arithmetic number, because the mean of its divisors is an integer number (5963776).

Almost surely, 2^155399652 is an apocalyptic number.

155399652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155399652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214695936).

155399652 is an abundant number, since it is smaller than the sum of its proper divisors (273992220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155399652 is a wasteful number, since it uses less digits than its factorization.

155399652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249 (or 8244 counting only the distinct ones).

The product of its digits is 364500, while the sum is 45.

The square root of 155399652 is about 12465.9396757725. The cubic root of 155399652 is about 537.6298177153.

The spelling of 155399652 in words is "one hundred fifty-five million, three hundred ninety-nine thousand, six hundred fifty-two".