1072991624 has 8 divisors (see below), whose sum is σ = 2011859310. Its totient is φ = 536495808.

The previous prime is 1072991611. The next prime is 1072991657. The reversal of 1072991624 is 4261992701.

It can be written as a sum of positive squares in only one way, i.e., 870840100 + 202151524 = 29510^2 + 14218^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1072991624² = 2302622050348314752, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 67061969 + ... + 67061984.

Almost surely, 2^1072991624 is an apocalyptic number.

It is an amenable number.

1072991624 is a deficient number, since it is larger than the sum of its proper divisors (938867686).

1072991624 is a wasteful number, since it uses less digits than its factorization.

1072991624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134123959 (or 134123955 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1072991624 is about 32756.5508562791. The cubic root of 1072991624 is about 1023.7614622803.

The spelling of 1072991624 in words is "one billion, seventy-two million, nine hundred ninety-one thousand, six hundred twenty-four".