1891079952 has 40 divisors (see below), whose sum is σ = 4894731360. Its totient is φ = 629141760.

The previous prime is 1891079947. The next prime is 1891079969. The reversal of 1891079952 is 2599701981.

It is a junction number, because it is equal to n+sod(n) for n = 1891079895 and 1891079904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12802 + ... + 62817.

It is an arithmetic number, because the mean of its divisors is an integer number (122368284).

Almost surely, 2^1891079952 is an apocalyptic number.

1891079952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1891079952 is an abundant number, since it is smaller than the sum of its proper divisors (3003651408).

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

1891079952 is a wasteful number, since it uses less digits than its factorization.

1891079952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76151 (or 76145 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 51.

The square root of 1891079952 is about 43486.5490927942. The cubic root of 1891079952 is about 1236.6210366536.

The spelling of 1891079952 in words is "one billion, eight hundred ninety-one million, seventy-nine thousand, nine hundred fifty-two".