1398474278 has 8 divisors (see below), whose sum is σ = 2100016800. Its totient is φ = 698468680.

The previous prime is 1398474277. The next prime is 1398474283. The reversal of 1398474278 is 8724748931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398474277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381953 + ... + 385596.

It is an arithmetic number, because the mean of its divisors is an integer number (262502100).

Almost surely, 2^1398474278 is an apocalyptic number.

1398474278 is a deficient number, since it is larger than the sum of its proper divisors (701542522).

1398474278 is an equidigital number, since it uses as much as digits as its factorization.

1398474278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768462.

The product of its digits is 2709504, while the sum is 53.

The square root of 1398474278 is about 37396.1799920794. The cubic root of 1398474278 is about 1118.2824114306.

The spelling of 1398474278 in words is "one billion, three hundred ninety-eight million, four hundred seventy-four thousand, two hundred seventy-eight".