1542703978 has 16 divisors (see below), whose sum is σ = 2417527296. Its totient is φ = 736941040.

The previous prime is 1542703957. The next prime is 1542703979. The reversal of 1542703978 is 8793072451.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (1542703979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20268 + ... + 59128.

It is an arithmetic number, because the mean of its divisors is an integer number (151095456).

Almost surely, 2^1542703978 is an apocalyptic number.

1542703978 is a deficient number, since it is larger than the sum of its proper divisors (874823318).

1542703978 is a wasteful number, since it uses less digits than its factorization.

1542703978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39749.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1542703978 is about 39277.2705008889. The cubic root of 1542703978 is about 1155.4758327513.

The spelling of 1542703978 in words is "one billion, five hundred forty-two million, seven hundred three thousand, nine hundred seventy-eight".