2639421400 has 144 divisors (see below), whose sum is σ = 7709350320. Its totient is φ = 822624000.

The previous prime is 2639421353. The next prime is 2639421431. The reversal of 2639421400 is 41249362.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 161610 + ... + 177190.

It is an arithmetic number, because the mean of its divisors is an integer number (53537155).

Almost surely, 2^2639421400 is an apocalyptic number.

2639421400 is a gapful number since it is divisible by the number (20) 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 2639421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3854675160).

2639421400 is an abundant number, since it is smaller than the sum of its proper divisors (5069928920).

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

2639421400 is a wasteful number, since it uses less digits than its factorization.

2639421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15626 (or 15606 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2639421400 is about 51375.2995125089. The cubic root of 2639421400 is about 1381.9836696634.

The spelling of 2639421400 in words is "two billion, six hundred thirty-nine million, four hundred twenty-one thousand, four hundred".