113402640 has 160 divisors (see below), whose sum is σ = 398724480. Its totient is φ = 26431488.

The previous prime is 113402623. The next prime is 113402671. The reversal of 113402640 is 46204311.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58324 + ... + 60236.

It is an arithmetic number, because the mean of its divisors is an integer number (2492028).

Almost surely, 2^113402640 is an apocalyptic number.

113402640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113402640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199362240).

113402640 is an abundant number, since it is smaller than the sum of its proper divisors (285321840).

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

113402640 is a wasteful number, since it uses less digits than its factorization.

113402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 113402640 is about 10649.0675648152. The cubic root of 113402640 is about 484.0323499084.

Adding to 113402640 its reverse (46204311), we get a palindrome (159606951).

It can be divided in two parts, 113 and 402640, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 113402640 in words is "one hundred thirteen million, four hundred two thousand, six hundred forty".