71420990 has 16 divisors (see below), whose sum is σ = 129572352. Its totient is φ = 28342944.

The previous prime is 71420983. The next prime is 71421011. The reversal of 71420990 is 9902417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26849 + ... + 29388.

It is an arithmetic number, because the mean of its divisors is an integer number (8098272).

Almost surely, 2^71420990 is an apocalyptic number.

71420990 is a deficient number, since it is larger than the sum of its proper divisors (58151362).

71420990 is a wasteful number, since it uses less digits than its factorization.

71420990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56371.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 71420990 is about 8451.0940120200. The cubic root of 71420990 is about 414.8985865324.

The spelling of 71420990 in words is "seventy-one million, four hundred twenty thousand, nine hundred ninety".