157928705 has 16 divisors (see below), whose sum is σ = 207662400. Its totient is φ = 114346560.

The previous prime is 157928699. The next prime is 157928713. The reversal of 157928705 is 507829751.

It is a de Polignac number, because none of the positive numbers 2^k-157928705 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6326 + ... + 18864.

It is an arithmetic number, because the mean of its divisors is an integer number (12978900).

Almost surely, 2^157928705 is an apocalyptic number.

It is an amenable number.

157928705 is a deficient number, since it is larger than the sum of its proper divisors (49733695).

157928705 is a wasteful number, since it uses less digits than its factorization.

157928705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784.

The product of its (nonzero) digits is 176400, while the sum is 44.

The square root of 157928705 is about 12566.9688071547. The cubic root of 157928705 is about 540.5306911351.

The spelling of 157928705 in words is "one hundred fifty-seven million, nine hundred twenty-eight thousand, seven hundred five".