155478942 has 24 divisors (see below), whose sum is σ = 351518544. Its totient is φ = 49572864.

The previous prime is 155478931. The next prime is 155478979. The reversal of 155478942 is 249874551.

155478942 is a `hidden beast` number, since 1 + 554 + 7 + 8 + 94 + 2 = 666.

155478942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187363 + ... + 188190.

It is an arithmetic number, because the mean of its divisors is an integer number (14646606).

Almost surely, 2^155478942 is an apocalyptic number.

155478942 is an abundant number, since it is smaller than the sum of its proper divisors (196039602).

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

155478942 is a wasteful number, since it uses less digits than its factorization.

155478942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375584 (or 375581 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 155478942 is about 12469.1195358774. The cubic root of 155478942 is about 537.7212409576.

The spelling of 155478942 in words is "one hundred fifty-five million, four hundred seventy-eight thousand, nine hundred forty-two".