6374438820 has 72 divisors (see below), whose sum is σ = 20353482240. Its totient is φ = 1610383680.

The previous prime is 6374438771. The next prime is 6374438867. The reversal of 6374438820 is 288344736.

6374438820 is a `hidden beast` number, since 637 + 4 + 4 + 3 + 8 + 8 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928516 + ... + 935355.

Almost surely, 2^6374438820 is an apocalyptic number.

6374438820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6374438820 is an abundant number, since it is smaller than the sum of its proper divisors (13979043420).

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

6374438820 is a wasteful number, since it uses less digits than its factorization.

6374438820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863905 (or 1863900 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 6374438820 is about 79840.0827905382. The cubic root of 6374438820 is about 1854.1604752818.

The spelling of 6374438820 in words is "six billion, three hundred seventy-four million, four hundred thirty-eight thousand, eight hundred twenty".