674513820 has 36 divisors (see below), whose sum is σ = 2046025800. Its totient is φ = 179870304.

The previous prime is 674513809. The next prime is 674513843. The reversal of 674513820 is 28315476.

674513820 is a `hidden beast` number, since 67 + 4 + 513 + 82 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1873470 + ... + 1873829.

It is an arithmetic number, because the mean of its divisors is an integer number (56834050).

Almost surely, 2^674513820 is an apocalyptic number.

674513820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

674513820 is an abundant number, since it is smaller than the sum of its proper divisors (1371511980).

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

674513820 is a wasteful number, since it uses less digits than its factorization.

674513820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747314 (or 3747309 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 674513820 is about 25971.4038896630. The cubic root of 674513820 is about 876.9946636282.

The spelling of 674513820 in words is "six hundred seventy-four million, five hundred thirteen thousand, eight hundred twenty".