1916687928 has 32 divisors (see below), whose sum is σ = 5043916800. Its totient is φ = 605269728.

The previous prime is 1916687917. The next prime is 1916687939. The reversal of 1916687928 is 8297866191.

1916687928 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1916687917) and next prime (1916687939).

It is a super-2 number, since 2×1916687928² = 7347385226681866368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

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, 2101176 + ... + 2102087.

It is an arithmetic number, because the mean of its divisors is an integer number (157622400).

Almost surely, 2^1916687928 is an apocalyptic number.

It is an amenable number.

1916687928 is an abundant number, since it is smaller than the sum of its proper divisors (3127228872).

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

1916687928 is a wasteful number, since it uses less digits than its factorization.

1916687928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203291 (or 4203287 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 57.

The square root of 1916687928 is about 43779.9946094104. The cubic root of 1916687928 is about 1242.1779120254.

The spelling of 1916687928 in words is "one billion, nine hundred sixteen million, six hundred eighty-seven thousand, nine hundred twenty-eight".