155416440 has 32 divisors (see below), whose sum is σ = 466249680. Its totient is φ = 41444352.

The previous prime is 155416433. The next prime is 155416441. The reversal of 155416440 is 44614551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155416398 and 155416407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155416441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647449 + ... + 647688.

Almost surely, 2^155416440 is an apocalyptic number.

155416440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155416440 is an abundant number, since it is smaller than the sum of its proper divisors (310833240).

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

155416440 is a wasteful number, since it uses less digits than its factorization.

155416440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295151 (or 1295147 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 155416440 is about 12466.6130123623. The cubic root of 155416440 is about 537.6491772704.

The spelling of 155416440 in words is "one hundred fifty-five million, four hundred sixteen thousand, four hundred forty".