1542625380 has 72 divisors (see below), whose sum is σ = 4685603832. Its totient is φ = 410812416.

The previous prime is 1542625363. The next prime is 1542625393. The reversal of 1542625380 is 835262451.

1542625380 is a `hidden beast` number, since 1 + 542 + 62 + 53 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 478821924 + 1063803456 = 21882^2 + 32616^2 .

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 23 ways as a sum of consecutive naturals, for example, 138084 + ... + 148836.

It is an arithmetic number, because the mean of its divisors is an integer number (65077831).

Almost surely, 2^1542625380 is an apocalyptic number.

1542625380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1542625380 is an abundant number, since it is smaller than the sum of its proper divisors (3142978452).

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

1542625380 is a wasteful number, since it uses less digits than its factorization.

1542625380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11565 (or 11560 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1542625380 is about 39276.2699349111. The cubic root of 1542625380 is about 1155.4562092778.

The spelling of 1542625380 in words is "one billion, five hundred forty-two million, six hundred twenty-five thousand, three hundred eighty".