1625490720 has 384 divisors, whose sum is σ = 6640704000. Its totient is φ = 371202048.

The previous prime is 1625490709. The next prime is 1625490733. The reversal of 1625490720 is 270945261.

1625490720 is a `hidden beast` number, since 1 + 625 + 4 + 9 + 0 + 7 + 20 = 666.

It is a super-2 number, since 2×1625490720² = 5284440161612236800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1481212 + ... + 1482308.

It is an arithmetic number, because the mean of its divisors is an integer number (17293500).

Almost surely, 2^1625490720 is an apocalyptic number.

1625490720 is a gapful number since it is divisible by the number (10) 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 1625490720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3320352000).

1625490720 is an abundant number, since it is smaller than the sum of its proper divisors (5015213280).

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

1625490720 is a wasteful number, since it uses less digits than its factorization.

1625490720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1625490720 is about 40317.3749145452. The cubic root of 1625490720 is about 1175.7856752276.

The spelling of 1625490720 in words is "one billion, six hundred twenty-five million, four hundred ninety thousand, seven hundred twenty".