1640467630 has 16 divisors (see below), whose sum is σ = 3021513264. Its totient is φ = 640926720.

The previous prime is 1640467573. The next prime is 1640467637. The reversal of 1640467630 is 367640461.

It is a super-2 number, since 2×1640467630² = 5382268090155633800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1640467630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640467637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907091 + ... + 1907950.

It is an arithmetic number, because the mean of its divisors is an integer number (188844579).

Almost surely, 2^1640467630 is an apocalyptic number.

1640467630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640467630 is a deficient number, since it is larger than the sum of its proper divisors (1381045634).

1640467630 is a wasteful number, since it uses less digits than its factorization.

1640467630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815091.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1640467630 is about 40502.6867010079. The cubic root of 1640467630 is about 1179.3857834732.

The spelling of 1640467630 in words is "one billion, six hundred forty million, four hundred sixty-seven thousand, six hundred thirty".