1634437980 has 96 divisors (see below), whose sum is σ = 5811348480. Its totient is φ = 373584960.

The previous prime is 1634437979. The next prime is 1634437993. The reversal of 1634437980 is 897344361.

1634437980 is a `hidden beast` number, since 1 + 63 + 443 + 79 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212416 + ... + 219975.

It is an arithmetic number, because the mean of its divisors is an integer number (60534880).

Almost surely, 2^1634437980 is an apocalyptic number.

1634437980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1634437980 is an abundant number, since it is smaller than the sum of its proper divisors (4176910500).

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

1634437980 is a wasteful number, since it uses less digits than its factorization.

1634437980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432416 (or 432408 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1634437980 is about 40428.1829915716. The cubic root of 1634437980 is about 1177.9390386829.

The spelling of 1634437980 in words is "one billion, six hundred thirty-four million, four hundred thirty-seven thousand, nine hundred eighty".