1891369152 has 42 divisors (see below), whose sum is σ = 5421269828. Its totient is φ = 630456192.

The previous prime is 1891369069. The next prime is 1891369211. The reversal of 1891369152 is 2519631981.

It is a junction number, because it is equal to n+sod(n) for n = 1891369098 and 1891369107.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1641238 + ... + 1642389.

Almost surely, 2^1891369152 is an apocalyptic number.

1891369152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1891369152 is an abundant number, since it is smaller than the sum of its proper divisors (3529900676).

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

1891369152 is a wasteful number, since it uses less digits than its factorization.

1891369152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283645 (or 3283632 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1891369152 is about 43489.8741318022. The cubic root of 1891369152 is about 1236.6840716361.

The spelling of 1891369152 in words is "one billion, eight hundred ninety-one million, three hundred sixty-nine thousand, one hundred fifty-two".