1151640444 has 12 divisors (see below), whose sum is σ = 2687161064. Its totient is φ = 383880144.

The previous prime is 1151640419. The next prime is 1151640449. The reversal of 1151640444 is 4440461511.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151640449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47985007 + ... + 47985030.

Almost surely, 2^1151640444 is an apocalyptic number.

It is an amenable number.

1151640444 is an abundant number, since it is smaller than the sum of its proper divisors (1535520620).

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

1151640444 is a wasteful number, since it uses less digits than its factorization.

1151640444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95970044 (or 95970042 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1151640444 is about 33935.8283234696. The cubic root of 1151640444 is about 1048.1874834538.

The spelling of 1151640444 in words is "one billion, one hundred fifty-one million, six hundred forty thousand, four hundred forty-four".