1542640892 has 24 divisors (see below), whose sum is σ = 2910042576. Its totient is φ = 711312768.

The previous prime is 1542640849. The next prime is 1542640901. The reversal of 1542640892 is 2980462451.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43523 + ... + 70565.

It is an arithmetic number, because the mean of its divisors is an integer number (121251774).

Almost surely, 2^1542640892 is an apocalyptic number.

It is an amenable number.

1542640892 is a deficient number, since it is larger than the sum of its proper divisors (1367401684).

1542640892 is a wasteful number, since it uses less digits than its factorization.

1542640892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28157 (or 28155 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1542640892 is about 39276.4674073420. The cubic root of 1542640892 is about 1155.4600821940.

The spelling of 1542640892 in words is "one billion, five hundred forty-two million, six hundred forty thousand, eight hundred ninety-two".