15940057 has 8 divisors (see below), whose sum is σ = 18641216. Its totient is φ = 13344912.

The previous prime is 15940049. The next prime is 15940073. The reversal of 15940057 is 75004951.

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

It is not a de Polignac number, because 15940057 - 2³ = 15940049 is a prime.

It is the 3993-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15940027) by changing a digit.

It is a nontrivial repunit in base 3992.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26178 + ... + 26779.

It is an arithmetic number, because the mean of its divisors is an integer number (2330152).

Almost surely, 2^15940057 is an apocalyptic number.

It is an amenable number.

15940057 is a deficient number, since it is larger than the sum of its proper divisors (2701159).

15940057 is an equidigital number, since it uses as much as digits as its factorization.

15940057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53007.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 15940057 is about 3992.5000939261. The cubic root of 15940057 is about 251.6691351502.

The spelling of 15940057 in words is "fifteen million, nine hundred forty thousand, fifty-seven".