1986051402 has 24 divisors (see below), whose sum is σ = 4304049984. Its totient is φ = 661872744.

The previous prime is 1986051391. The next prime is 1986051407. The reversal of 1986051402 is 2041506891.

1986051402 is a `hidden beast` number, since 1 + 9 + 8 + 605 + 1 + 40 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1986051407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101983 + ... + 119885.

It is an arithmetic number, because the mean of its divisors is an integer number (179335416).

Almost surely, 2^1986051402 is an apocalyptic number.

1986051402 is an abundant number, since it is smaller than the sum of its proper divisors (2317998582).

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

1986051402 is a wasteful number, since it uses less digits than its factorization.

1986051402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24074 (or 24071 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1986051402 is about 44565.1366204570. The cubic root of 1986051402 is about 1256.9851920569.

It can be divided in two parts, 198 and 6051402, that added together give a square (6051600 = 2460²).

The spelling of 1986051402 in words is "one billion, nine hundred eighty-six million, fifty-one thousand, four hundred two".