155435920 has 40 divisors (see below), whose sum is σ = 370210680. Its totient is φ = 60656640.

The previous prime is 155435873. The next prime is 155435921. The reversal of 155435920 is 29534551.

It can be written as a sum of positive squares in 4 ways, for example, as 11723776 + 143712144 = 3424^2 + 11988^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (155435921) 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, 20415 + ... + 26974.

It is an arithmetic number, because the mean of its divisors is an integer number (9255267).

Almost surely, 2^155435920 is an apocalyptic number.

155435920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155435920 is an abundant number, since it is smaller than the sum of its proper divisors (214774760).

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

155435920 is a wasteful number, since it uses less digits than its factorization.

155435920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47443 (or 47437 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 155435920 is about 12467.3942746670. The cubic root of 155435920 is about 537.6716394338.

The spelling of 155435920 in words is "one hundred fifty-five million, four hundred thirty-five thousand, nine hundred twenty".