71383690 has 24 divisors (see below), whose sum is σ = 149469732. Its totient is φ = 24474240.

The previous prime is 71383681. The next prime is 71383709. The reversal of 71383690 is 9638317.

It can be written as a sum of positive squares in 2 ways, for example, as 60047001 + 11336689 = 7749^2 + 3367^2 .

It is a super-2 number, since 2×71383690² = 10191262396032200, which contains 22 as substring.

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, 72351 + ... + 73330.

Almost surely, 2^71383690 is an apocalyptic number.

71383690 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71383690 is an abundant number, since it is smaller than the sum of its proper divisors (78086042).

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

71383690 is a wasteful number, since it uses less digits than its factorization.

71383690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145702 (or 145695 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 71383690 is about 8448.8869089366. The cubic root of 71383690 is about 414.8263462747.

The spelling of 71383690 in words is "seventy-one million, three hundred eighty-three thousand, six hundred ninety".