39400120643424 has 48 divisors (see below), whose sum is σ = 103461018253488. Its totient is φ = 13128840015872.

The previous prime is 39400120643423. The next prime is 39400120643479. The reversal of 39400120643424 is 42434602100493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39400120643423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70556877 + ... + 71113100.

It is an arithmetic number, because the mean of its divisors is an integer number (2155437880281).

Almost surely, 2^{39400120643424} is an apocalyptic number.

It is an amenable number.

39400120643424 is an abundant number, since it is smaller than the sum of its proper divisors (64060897610064).

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

39400120643424 is a wasteful number, since it uses less digits than its factorization.

39400120643424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141672887 (or 141672879 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 39400120643424 in words is "thirty-nine trillion, four hundred billion, one hundred twenty million, six hundred forty-three thousand, four hundred twenty-four".