16870557 has 32 divisors (see below), whose sum is σ = 25893504. Its totient is φ = 9676800.

The previous prime is 16870549. The next prime is 16870559. The reversal of 16870557 is 75507861.

It is not a de Polignac number, because 16870557 - 2³ = 16870549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16870559) 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 31 ways as a sum of consecutive naturals, for example, 49893 + ... + 50229.

It is an arithmetic number, because the mean of its divisors is an integer number (809172).

Almost surely, 2^16870557 is an apocalyptic number.

It is an amenable number.

16870557 is a deficient number, since it is larger than the sum of its proper divisors (9022947).

16870557 is a wasteful number, since it uses less digits than its factorization.

16870557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 16870557 is about 4107.3783609500. The cubic root of 16870557 is about 256.4738791422.

The spelling of 16870557 in words is "sixteen million, eight hundred seventy thousand, five hundred fifty-seven".