1954405632 has 72 divisors (see below), whose sum is σ = 5220915616. Its totient is φ = 649046016.

The previous prime is 1954405627. The next prime is 1954405669. The reversal of 1954405632 is 2365044591.

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, 208143 + ... + 217329.

Almost surely, 2^1954405632 is an apocalyptic number.

1954405632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1954405632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610457808).

1954405632 is an abundant number, since it is smaller than the sum of its proper divisors (3266509984).

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

1954405632 is an equidigital number, since it uses as much as digits as its factorization.

1954405632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9483 (or 9469 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1954405632 is about 44208.6601470798. The cubic root of 1954405632 is about 1250.2731418038.

The spelling of 1954405632 in words is "one billion, nine hundred fifty-four million, four hundred five thousand, six hundred thirty-two".