1542684638 has 16 divisors (see below), whose sum is σ = 2611442160. Its totient is φ = 677040000.

The previous prime is 1542684629. The next prime is 1542684643. The reversal of 1542684638 is 8364862451.

It is a junction number, because it is equal to n+sod(n) for n = 1542684592 and 1542684601.

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, 1208363 + ... + 1209638.

It is an arithmetic number, because the mean of its divisors is an integer number (163215135).

Almost surely, 2^1542684638 is an apocalyptic number.

1542684638 is a deficient number, since it is larger than the sum of its proper divisors (1068757522).

1542684638 is a wasteful number, since it uses less digits than its factorization.

1542684638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418043.

The product of its digits is 1105920, while the sum is 47.

The square root of 1542684638 is about 39277.0243017467. The cubic root of 1542684638 is about 1155.4710042172.

The spelling of 1542684638 in words is "one billion, five hundred forty-two million, six hundred eighty-four thousand, six hundred thirty-eight".