640103424 has 44 divisors (see below), whose sum is σ = 1706117184. Its totient is φ = 213366784.

The previous prime is 640103393. The next prime is 640103473. The reversal of 640103424 is 424301046.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 640103394 and 640103403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101112 + ... + 107255.

Almost surely, 2^640103424 is an apocalyptic number.

640103424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

640103424 is an abundant number, since it is smaller than the sum of its proper divisors (1066013760).

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

640103424 is a wasteful number, since it uses less digits than its factorization.

640103424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208390 (or 208372 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 640103424 is about 25300.2652950517. The cubic root of 640103424 is about 861.8202943986.

The spelling of 640103424 in words is "six hundred forty million, one hundred three thousand, four hundred twenty-four".