2491628400 has 180 divisors, whose sum is σ = 8757093280. Its totient is φ = 655948800.

The previous prime is 2491628393. The next prime is 2491628411. The reversal of 2491628400 is 48261942.

2491628400 is a `hidden beast` number, since 24 + 9 + 1 + 628 + 4 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 280020 + ... + 288780.

Almost surely, 2^2491628400 is an apocalyptic number.

2491628400 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 2491628400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4378546640).

2491628400 is an abundant number, since it is smaller than the sum of its proper divisors (6265464880).

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

2491628400 is a wasteful number, since it uses less digits than its factorization.

2491628400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864 (or 8850 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2491628400 is about 49916.2137987248. The cubic root of 2491628400 is about 1355.6921795865.

It can be divided in two parts, 2491628 and 400, that added together give a triangular number (2492028 = T₂₂₃₂).

The spelling of 2491628400 in words is "two billion, four hundred ninety-one million, six hundred twenty-eight thousand, four hundred".