1402639890 has 32 divisors (see below), whose sum is σ = 3373966656. Its totient is φ = 373189440.

The previous prime is 1402639879. The next prime is 1402639921. The reversal of 1402639890 is 989362041.

It is a super-2 number, since 2×1402639890² = 3934797322038424200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39481 + ... + 66060.

It is an arithmetic number, because the mean of its divisors is an integer number (105436458).

Almost surely, 2^1402639890 is an apocalyptic number.

1402639890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1402639890 is an abundant number, since it is smaller than the sum of its proper divisors (1971326766).

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

1402639890 is a wasteful number, since it uses less digits than its factorization.

1402639890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105994.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1402639890 is about 37451.8342674962. The cubic root of 1402639890 is about 1119.3916471918.

The spelling of 1402639890 in words is "one billion, four hundred two million, six hundred thirty-nine thousand, eight hundred ninety".