1868840477 has 16 divisors (see below), whose sum is σ = 2163351552. Its totient is φ = 1581346800.

The previous prime is 1868840453. The next prime is 1868840483. The reversal of 1868840477 is 7740488681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868840477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868840497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166868 + ... + 177714.

It is an arithmetic number, because the mean of its divisors is an integer number (135209472).

Almost surely, 2^1868840477 is an apocalyptic number.

It is an amenable number.

1868840477 is a deficient number, since it is larger than the sum of its proper divisors (294511075).

1868840477 is a wasteful number, since it uses less digits than its factorization.

1868840477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11168.

The product of its (nonzero) digits is 2408448, while the sum is 53.

The square root of 1868840477 is about 43230.0876358122. The cubic root of 1868840477 is about 1231.7542723097.

The spelling of 1868840477 in words is "one billion, eight hundred sixty-eight million, eight hundred forty thousand, four hundred seventy-seven".