1625412540 has 48 divisors (see below), whose sum is σ = 4553902080. Its totient is φ = 433181760.

The previous prime is 1625412521. The next prime is 1625412557. The reversal of 1625412540 is 452145261.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1625412498 and 1625412507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105021 + ... + 119499.

It is an arithmetic number, because the mean of its divisors is an integer number (94872960).

Almost surely, 2^1625412540 is an apocalyptic number.

1625412540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625412540 is an abundant number, since it is smaller than the sum of its proper divisors (2928489540).

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

1625412540 is a wasteful number, since it uses less digits than its factorization.

1625412540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16362 (or 16360 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1625412540 is about 40316.4053457150. The cubic root of 1625412540 is about 1175.7668246334.

The spelling of 1625412540 in words is "one billion, six hundred twenty-five million, four hundred twelve thousand, five hundred forty".