398978294 has 16 divisors (see below), whose sum is σ = 703095120. Its totient is φ = 167403360.

The previous prime is 398978267. The next prime is 398978297. The reversal of 398978294 is 492879893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398978297) 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, 697229 + ... + 697800.

It is an arithmetic number, because the mean of its divisors is an integer number (43943445).

Almost surely, 2^398978294 is an apocalyptic number.

398978294 is a deficient number, since it is larger than the sum of its proper divisors (304116826).

398978294 is a wasteful number, since it uses less digits than its factorization.

398978294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395055.

The product of its digits is 7838208, while the sum is 59.

The square root of 398978294 is about 19974.4410184616. The cubic root of 398978294 is about 736.1784319963.

The spelling of 398978294 in words is "three hundred ninety-eight million, nine hundred seventy-eight thousand, two hundred ninety-four".