31400030 has 16 divisors (see below), whose sum is σ = 56689200. Its totient is φ = 12522432.

The previous prime is 31400029. The next prime is 31400053. The reversal of 31400030 is 3000413.

It is a junction number, because it is equal to n+sod(n) for n = 31399984 and 31400020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055 + ... + 7994.

It is an arithmetic number, because the mean of its divisors is an integer number (3543075).

Almost surely, 2^31400030 is an apocalyptic number.

31400030 is a deficient number, since it is larger than the sum of its proper divisors (25289170).

31400030 is a wasteful number, since it uses less digits than its factorization.

31400030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9403.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 31400030 is about 5603.5729673129. The cubic root of 31400030 is about 315.4835271600.

Adding to 31400030 its reverse (3000413), we get a palindrome (34400443).

The spelling of 31400030 in words is "thirty-one million, four hundred thousand, thirty".