40402323440 has 80 divisors (see below), whose sum is σ = 94530110400. Its totient is φ = 16058904576.

The previous prime is 40402323427. The next prime is 40402323487. The reversal of 40402323440 is 4432320404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10861901 + ... + 10865619.

It is an arithmetic number, because the mean of its divisors is an integer number (1181626380).

Almost surely, 2^40402323440 is an apocalyptic number.

40402323440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40402323440 is an abundant number, since it is smaller than the sum of its proper divisors (54127786960).

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

40402323440 is a wasteful number, since it uses less digits than its factorization.

40402323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554 (or 4548 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 40402323440 its reverse (4432320404), we get a palindrome (44834643844).

The spelling of 40402323440 in words is "forty billion, four hundred two million, three hundred twenty-three thousand, four hundred forty".