31418120 has 32 divisors (see below), whose sum is σ = 71064000. Its totient is φ = 12500928.

The previous prime is 31418099. The next prime is 31418131. The reversal of 31418120 is 2181413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31418092 and 31418101.

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, 5987 + ... + 9933.

It is an arithmetic number, because the mean of its divisors is an integer number (2220750).

Almost surely, 2^31418120 is an apocalyptic number.

It is an amenable number.

31418120 is an abundant number, since it is smaller than the sum of its proper divisors (39645880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31418120 is a wasteful number, since it uses less digits than its factorization.

31418120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157 (or 4153 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 31418120 is about 5605.1868835927. The cubic root of 31418120 is about 315.5441003652.

Adding to 31418120 its reverse (2181413), we get a palindrome (33599533).

The spelling of 31418120 in words is "thirty-one million, four hundred eighteen thousand, one hundred twenty".