31401450 has 72 divisors (see below), whose sum is σ = 87125376. Its totient is φ = 8100000.

The previous prime is 31401439. The next prime is 31401451. The reversal of 31401450 is 5410413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31401451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12825 + ... + 15075.

Almost surely, 2^31401450 is an apocalyptic number.

31401450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31401450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43562688).

31401450 is an abundant number, since it is smaller than the sum of its proper divisors (55723926).

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

31401450 is a wasteful number, since it uses less digits than its factorization.

31401450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300 (or 2292 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31401450 is about 5603.6996707532. The cubic root of 31401450 is about 315.4882827803.

Adding to 31401450 its reverse (5410413), we get a palindrome (36811863).

The spelling of 31401450 in words is "thirty-one million, four hundred one thousand, four hundred fifty".