678744490 has 16 divisors (see below), whose sum is σ = 1274859648. Its totient is φ = 259693456.

The previous prime is 678744487. The next prime is 678744491. The reversal of 678744490 is 94447876.

It is not an unprimeable number, because it can be changed into a prime (678744491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475302 + ... + 1475761.

It is an arithmetic number, because the mean of its divisors is an integer number (79678728).

Almost surely, 2^678744490 is an apocalyptic number.

678744490 is a deficient number, since it is larger than the sum of its proper divisors (596115158).

678744490 is a wasteful number, since it uses less digits than its factorization.

678744490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951093.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 678744490 is about 26052.7251933459. The cubic root of 678744490 is about 878.8243986929.

The spelling of 678744490 in words is "six hundred seventy-eight million, seven hundred forty-four thousand, four hundred ninety".