1972389542 has 16 divisors (see below), whose sum is σ = 3032188992. Its totient is φ = 961682880.

The previous prime is 1972389511. The next prime is 1972389547. The reversal of 1972389542 is 2459832791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972389547) 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, 222548 + ... + 231240.

It is an arithmetic number, because the mean of its divisors is an integer number (189511812).

Almost surely, 2^1972389542 is an apocalyptic number.

1972389542 is a deficient number, since it is larger than the sum of its proper divisors (1059799450).

1972389542 is a wasteful number, since it uses less digits than its factorization.

1972389542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503.

The product of its digits is 1088640, while the sum is 50.

The square root of 1972389542 is about 44411.5924281037. The cubic root of 1972389542 is about 1254.0963303584.

The spelling of 1972389542 in words is "one billion, nine hundred seventy-two million, three hundred eighty-nine thousand, five hundred forty-two".