156097990 has 16 divisors (see below), whose sum is σ = 284135040. Its totient is φ = 61737280.

The previous prime is 156097969. The next prime is 156097999. The reversal of 156097990 is 99790651.

It is a self number, because there is not a number n which added to its sum of digits gives 156097990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156097999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86806 + ... + 88585.

It is an arithmetic number, because the mean of its divisors is an integer number (17758440).

Almost surely, 2^156097990 is an apocalyptic number.

156097990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156097990 is a deficient number, since it is larger than the sum of its proper divisors (128037050).

156097990 is a wasteful number, since it uses less digits than its factorization.

156097990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175487.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 156097990 is about 12493.9181204296. The cubic root of 156097990 is about 538.4339515066.

The spelling of 156097990 in words is "one hundred fifty-six million, ninety-seven thousand, nine hundred ninety".