674155428 has 12 divisors (see below), whose sum is σ = 1573029360. Its totient is φ = 224718472.

The previous prime is 674155423. The next prime is 674155439. The reversal of 674155428 is 824551476.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×674155428² = 908971082203726368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 674155428.

It is not an unprimeable number, because it can be changed into a prime (674155423) 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, 28089798 + ... + 28089821.

It is an arithmetic number, because the mean of its divisors is an integer number (131085780).

Almost surely, 2^674155428 is an apocalyptic number.

It is an amenable number.

674155428 is an abundant number, since it is smaller than the sum of its proper divisors (898873932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

674155428 is a wasteful number, since it uses less digits than its factorization.

674155428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56179626 (or 56179624 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 674155428 is about 25964.5032303720. The cubic root of 674155428 is about 876.8393104706.

The spelling of 674155428 in words is "six hundred seventy-four million, one hundred fifty-five thousand, four hundred twenty-eight".