6442504390 has 32 divisors (see below), whose sum is σ = 13256699904. Its totient is φ = 2208267360.

The previous prime is 6442504381. The next prime is 6442504391. The reversal of 6442504390 is 934052446.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442504391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311347 + ... + 331393.

It is an arithmetic number, because the mean of its divisors is an integer number (414271872).

Almost surely, 2^6442504390 is an apocalyptic number.

6442504390 is an abundant number, since it is smaller than the sum of its proper divisors (6814195514).

6442504390 is a wasteful number, since it uses less digits than its factorization.

6442504390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24652.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6442504390 is about 80265.2128259808. The cubic root of 6442504390 is about 1860.7366325335.

The spelling of 6442504390 in words is "six billion, four hundred forty-two million, five hundred four thousand, three hundred ninety".