1577994942 has 8 divisors (see below), whose sum is σ = 3155989896. Its totient is φ = 525998312.

The previous prime is 1577994931. The next prime is 1577994947. The reversal of 1577994942 is 2494997751.

It is a sphenic number, since it is the product of 3 distinct primes.

1577994942 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1577994947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131499573 + ... + 131499584.

It is an arithmetic number, because the mean of its divisors is an integer number (394498737).

Almost surely, 2^1577994942 is an apocalyptic number.

1577994942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1577994942 is a wasteful number, since it uses less digits than its factorization.

1577994942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262999162.

The product of its digits is 5715360, while the sum is 57.

The square root of 1577994942 is about 39723.9844678250. The cubic root of 1577994942 is about 1164.2203928991.

The spelling of 1577994942 in words is "one billion, five hundred seventy-seven million, nine hundred ninety-four thousand, nine hundred forty-two".