641477400 has 48 divisors (see below), whose sum is σ = 1988581800. Its totient is φ = 171060480.

The previous prime is 641477359. The next prime is 641477401. The reversal of 641477400 is 4774146.

It is a super-2 number, since 2×641477400² = 822986509421520000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641477401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533965 + ... + 535164.

Almost surely, 2^641477400 is an apocalyptic number.

641477400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641477400 is an abundant number, since it is smaller than the sum of its proper divisors (1347104400).

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

641477400 is a wasteful number, since it uses less digits than its factorization.

641477400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069148 (or 1069139 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 641477400 is about 25327.4041307040. The cubic root of 641477400 is about 862.4364834554.

The spelling of 641477400 in words is "six hundred forty-one million, four hundred seventy-seven thousand, four hundred".