155312740 has 24 divisors (see below), whose sum is σ = 355807872. Its totient is φ = 56477280.

The previous prime is 155312701. The next prime is 155312741. The reversal of 155312740 is 47213551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155312699 and 155312708.

It is not an unprimeable number, because it can be changed into a prime (155312741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352764 + ... + 353203.

It is an arithmetic number, because the mean of its divisors is an integer number (14825328).

Almost surely, 2^155312740 is an apocalyptic number.

155312740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155312740 is an abundant number, since it is smaller than the sum of its proper divisors (200495132).

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

155312740 is a wasteful number, since it uses less digits than its factorization.

155312740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705987 (or 705985 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 155312740 is about 12462.4532095410. The cubic root of 155312740 is about 537.5295703941.

The spelling of 155312740 in words is "one hundred fifty-five million, three hundred twelve thousand, seven hundred forty".