31401398 has 8 divisors (see below), whose sum is σ = 53830992. Its totient is φ = 13457736.

The previous prime is 31401389. The next prime is 31401401. The reversal of 31401398 is 89310413.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31401398.

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, 1121465 + ... + 1121492.

It is an arithmetic number, because the mean of its divisors is an integer number (6728874).

Almost surely, 2^31401398 is an apocalyptic number.

31401398 is a deficient number, since it is larger than the sum of its proper divisors (22429594).

31401398 is a wasteful number, since it uses less digits than its factorization.

31401398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242966.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31401398 is about 5603.6950309595. The cubic root of 31401398 is about 315.4881086333.

The spelling of 31401398 in words is "thirty-one million, four hundred one thousand, three hundred ninety-eight".