1672157587 has 16 divisors (see below), whose sum is σ = 1825182720. Its totient is φ = 1525836928.

The previous prime is 1672157573. The next prime is 1672157593. The reversal of 1672157587 is 7857512761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672157587 is a prime.

It is a super-2 number, since 2×1672157587² = 5592221991523325138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672157587.

It is not an unprimeable number, because it can be changed into a prime (1672157507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75714 + ... + 95272.

It is an arithmetic number, because the mean of its divisors is an integer number (114073920).

Almost surely, 2^1672157587 is an apocalyptic number.

1672157587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1672157587 is a deficient number, since it is larger than the sum of its proper divisors (153025133).

1672157587 is a wasteful number, since it uses less digits than its factorization.

1672157587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19730.

The product of its digits is 823200, while the sum is 49.

The square root of 1672157587 is about 40892.0235131498. The cubic root of 1672157587 is about 1186.9317154118.

The spelling of 1672157587 in words is "one billion, six hundred seventy-two million, one hundred fifty-seven thousand, five hundred eighty-seven".