650621040 has 40 divisors (see below), whose sum is σ = 2016925968. Its totient is φ = 173498880.

The previous prime is 650621039. The next prime is 650621051. The reversal of 650621040 is 40126056.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a self number, because there is not a number n which added to its sum of digits gives 650621040.

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, 1355221 + ... + 1355700.

Almost surely, 2^650621040 is an apocalyptic number.

650621040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

650621040 is an abundant number, since it is smaller than the sum of its proper divisors (1366304928).

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

650621040 is a wasteful number, since it uses less digits than its factorization.

650621040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710937 (or 2710931 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 650621040 is about 25507.2742565724. The cubic root of 650621040 is about 866.5148991313.

Adding to 650621040 its reverse (40126056), we get a palindrome (690747096).

The spelling of 650621040 in words is "six hundred fifty million, six hundred twenty-one thousand, forty".