1864555434 has 24 divisors (see below), whose sum is σ = 4616994720. Its totient is φ = 532730088.

The previous prime is 1864555397. The next prime is 1864555487. The reversal of 1864555434 is 4345554681.

1864555434 is a `hidden beast` number, since 1 + 8 + 64 + 5 + 554 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1864555434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7398904 + ... + 7399155.

It is an arithmetic number, because the mean of its divisors is an integer number (192374780).

Almost surely, 2^1864555434 is an apocalyptic number.

1864555434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1864555434 is an abundant number, since it is smaller than the sum of its proper divisors (2752439286).

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

1864555434 is a wasteful number, since it uses less digits than its factorization.

1864555434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14798074 (or 14798071 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 1864555434 is about 43180.4983065272. The cubic root of 1864555434 is about 1230.8121267599.

The spelling of 1864555434 in words is "one billion, eight hundred sixty-four million, five hundred fifty-five thousand, four hundred thirty-four".