23402001440 has 48 divisors (see below), whose sum is σ = 58539425112. Its totient is φ = 8810164224.

The previous prime is 23402001437. The next prime is 23402001527. The reversal of 23402001440 is 4410020432.

It can be written as a sum of positive squares in 4 ways, for example, as 20537182864 + 2864818576 = 143308^2 + 53524^2 .

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

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, 4299119 + ... + 4304558.

Almost surely, 2^23402001440 is an apocalyptic number.

23402001440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23402001440 is an abundant number, since it is smaller than the sum of its proper divisors (35137423672).

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

23402001440 is a wasteful number, since it uses less digits than its factorization.

23402001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8603709 (or 8603701 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 23402001440 its reverse (4410020432), we get a palindrome (27812021872).

The spelling of 23402001440 in words is "twenty-three billion, four hundred two million, one thousand, four hundred forty".