1139820644 has 6 divisors (see below), whose sum is σ = 1994686134. Its totient is φ = 569910320.

The previous prime is 1139820601. The next prime is 1139820691. The reversal of 1139820644 is 4460289311.

It can be written as a sum of positive squares in only one way, i.e., 1024000000 + 115820644 = 32000^2 + 10762^2 .

It is a super-2 number, since 2×1139820644² = 2598382200977149472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1139820598 and 1139820607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142477577 + ... + 142477584.

It is an arithmetic number, because the mean of its divisors is an integer number (332447689).

Almost surely, 2^1139820644 is an apocalyptic number.

It is an amenable number.

1139820644 is a deficient number, since it is larger than the sum of its proper divisors (854865490).

1139820644 is a wasteful number, since it uses less digits than its factorization.

1139820644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284955165 (or 284955163 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1139820644 is about 33761.2298946588. The cubic root of 1139820644 is about 1044.5891394004.

The spelling of 1139820644 in words is "one billion, one hundred thirty-nine million, eight hundred twenty thousand, six hundred forty-four".