1632400780 has 24 divisors (see below), whose sum is σ = 3520693008. Its totient is φ = 635312448.

The previous prime is 1632400771. The next prime is 1632400813. The reversal of 1632400780 is 870042361.

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, 1102234 + ... + 1103713.

It is an arithmetic number, because the mean of its divisors is an integer number (146695542).

Almost surely, 2^1632400780 is an apocalyptic number.

1632400780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1632400780 is an abundant number, since it is smaller than the sum of its proper divisors (1888292228).

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

1632400780 is a wasteful number, since it uses less digits than its factorization.

1632400780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205993 (or 2205991 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1632400780 is about 40402.9798406009. The cubic root of 1632400780 is about 1177.4494320328.

The spelling of 1632400780 in words is "one billion, six hundred thirty-two million, four hundred thousand, seven hundred eighty".