1625213340 has 72 divisors (see below), whose sum is σ = 4940714688. Its totient is φ = 432432000.

The previous prime is 1625213269. The next prime is 1625213353. The reversal of 1625213340 is 433125261.

1625213340 is a `hidden beast` number, since 1 + 625 + 2 + 1 + 3 + 34 + 0 = 666.

1625213340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73590 + ... + 93090.

Almost surely, 2^1625213340 is an apocalyptic number.

1625213340 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 1625213340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2470357344).

1625213340 is an abundant number, since it is smaller than the sum of its proper divisors (3315501348).

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

1625213340 is a wasteful number, since it uses less digits than its factorization.

1625213340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19979 (or 19974 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1625213340 is about 40313.9348116752. The cubic root of 1625213340 is about 1175.7187912236.

It can be divided in two parts, 16252 and 13340, that added together give a palindrome (29592).

The spelling of 1625213340 in words is "one billion, six hundred twenty-five million, two hundred thirteen thousand, three hundred forty".