38949144240 has 80 divisors (see below), whose sum is σ = 127097222400. Its totient is φ = 9839782656.

The previous prime is 38949144239. The next prime is 38949144277. The reversal of 38949144240 is 4244194983.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 38949144240.

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, 4266180 + ... + 4275299.

It is an arithmetic number, because the mean of its divisors is an integer number (1588715280).

Almost surely, 2^38949144240 is an apocalyptic number.

38949144240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38949144240 is an abundant number, since it is smaller than the sum of its proper divisors (88148078160).

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

38949144240 is a wasteful number, since it uses less digits than its factorization.

38949144240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541514 (or 8541508 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 38949144240 in words is "thirty-eight billion, nine hundred forty-nine million, one hundred forty-four thousand, two hundred forty".