6427940 has 12 divisors (see below), whose sum is σ = 13498716. Its totient is φ = 2571168.

The previous prime is 6427931. The next prime is 6427951. The reversal of 6427940 is 497246.

It can be written as a sum of positive squares in 2 ways, for example, as 1623076 + 4804864 = 1274^2 + 2192^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6427897 and 6427906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160679 + ... + 160718.

It is an arithmetic number, because the mean of its divisors is an integer number (1124893).

Almost surely, 2^6427940 is an apocalyptic number.

It is an amenable number.

6427940 is an abundant number, since it is smaller than the sum of its proper divisors (7070776).

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

6427940 is a wasteful number, since it uses less digits than its factorization.

6427940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321406 (or 321404 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6427940 is about 2535.3382417342. The cubic root of 6427940 is about 185.9333402784.

The spelling of 6427940 in words is "six million, four hundred twenty-seven thousand, nine hundred forty".