1640538296 has 32 divisors (see below), whose sum is σ = 3212330400. Its totient is φ = 783974400.

The previous prime is 1640538257. The next prime is 1640538313. The reversal of 1640538296 is 6928350461.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291800 + ... + 297368.

It is an arithmetic number, because the mean of its divisors is an integer number (100385325).

Almost surely, 2^1640538296 is an apocalyptic number.

It is an amenable number.

1640538296 is a deficient number, since it is larger than the sum of its proper divisors (1571792104).

1640538296 is a wasteful number, since it uses less digits than its factorization.

1640538296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7199 (or 7195 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1640538296 is about 40503.5590534955. The cubic root of 1640538296 is about 1179.4027179289.

The spelling of 1640538296 in words is "one billion, six hundred forty million, five hundred thirty-eight thousand, two hundred ninety-six".