247440398 has 8 divisors (see below), whose sum is σ = 373994280. Its totient is φ = 122775640.

The previous prime is 247440379. The next prime is 247440407. The reversal of 247440398 is 893044742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×247440398² = 122453501124796808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471953 + ... + 472476.

It is an arithmetic number, because the mean of its divisors is an integer number (46749285).

Almost surely, 2^247440398 is an apocalyptic number.

247440398 is a deficient number, since it is larger than the sum of its proper divisors (126553882).

247440398 is a wasteful number, since it uses less digits than its factorization.

247440398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944562.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 247440398 is about 15730.2383325873. The cubic root of 247440398 is about 627.8032146763.

The spelling of 247440398 in words is "two hundred forty-seven million, four hundred forty thousand, three hundred ninety-eight".