84388490 has 16 divisors (see below), whose sum is σ = 156005352. Its totient is φ = 32842944.

The previous prime is 84388477. The next prime is 84388517. The reversal of 84388490 is 9488348.

It can be written as a sum of positive squares in 4 ways, for example, as 57896881 + 26491609 = 7609^2 + 5147^2 .

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, 113669 + ... + 114408.

Almost surely, 2^84388490 is an apocalyptic number.

84388490 is a deficient number, since it is larger than the sum of its proper divisors (71616862).

84388490 is a wasteful number, since it uses less digits than its factorization.

84388490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228121.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 84388490 is about 9186.3208086807. The cubic root of 84388490 is about 438.6260343007.

The spelling of 84388490 in words is "eighty-four million, three hundred eighty-eight thousand, four hundred ninety".