2106398400 has 84 divisors (see below), whose sum is σ = 6910757832. Its totient is φ = 561704960.

The previous prime is 2106398377. The next prime is 2106398407. The reversal of 2106398400 is 48936012.

It is not an unprimeable number, because it can be changed into a prime (2106398407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214617 + ... + 224216.

Almost surely, 2^2106398400 is an apocalyptic number.

2106398400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106398400 is an abundant number, since it is smaller than the sum of its proper divisors (4804359432).

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

2106398400 is a wasteful number, since it uses less digits than its factorization.

2106398400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438858 (or 438843 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 2106398400 is about 45895.5161208587. The cubic root of 2106398400 is about 1281.8784269164.

The spelling of 2106398400 in words is "two billion, one hundred six million, three hundred ninety-eight thousand, four hundred".