7136428 has 12 divisors (see below), whose sum is σ = 13449520. Its totient is φ = 3293712.

The previous prime is 7136401. The next prime is 7136429. The reversal of 7136428 is 8246317.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7136428.

It is not an unprimeable number, because it can be changed into a prime (7136429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68568 + ... + 68671.

Almost surely, 2^7136428 is an apocalyptic number.

It is an amenable number.

7136428 is a deficient number, since it is larger than the sum of its proper divisors (6313092).

7136428 is a wasteful number, since it uses less digits than its factorization.

7136428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137256 (or 137254 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 7136428 is about 2671.4093658592. The cubic root of 7136428 is about 192.5278803718.

The spelling of 7136428 in words is "seven million, one hundred thirty-six thousand, four hundred twenty-eight".