155904394 has 8 divisors (see below), whose sum is σ = 241400448. Its totient is φ = 75437580.

The previous prime is 155904391. The next prime is 155904407. The reversal of 155904394 is 493409551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (155904391) 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 3 ways as a sum of consecutive naturals, for example, 1257232 + ... + 1257355.

It is an arithmetic number, because the mean of its divisors is an integer number (30175056).

Almost surely, 2^155904394 is an apocalyptic number.

155904394 is a deficient number, since it is larger than the sum of its proper divisors (85496054).

155904394 is a wasteful number, since it uses less digits than its factorization.

155904394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514620.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 155904394 is about 12486.1681071496. The cubic root of 155904394 is about 538.2112670634.

The spelling of 155904394 in words is "one hundred fifty-five million, nine hundred four thousand, three hundred ninety-four".