9139276440 has 256 divisors, whose sum is σ = 35013888000. Its totient is φ = 2077125120.

The previous prime is 9139276423. The next prime is 9139276453. The reversal of 9139276440 is 446729319.

It is a happy number.

9139276440 is a `hidden beast` number, since 9 + 139 + 2 + 76 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1365021 + ... + 1371699.

It is an arithmetic number, because the mean of its divisors is an integer number (136773000).

Almost surely, 2^9139276440 is an apocalyptic number.

9139276440 is a gapful number since it is divisible by the number (90) 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 9139276440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17506944000).

9139276440 is an abundant number, since it is smaller than the sum of its proper divisors (25874611560).

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

9139276440 is a wasteful number, since it uses less digits than its factorization.

9139276440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887 (or 6877 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 9139276440 is about 95599.5629697124. The cubic root of 9139276440 is about 2090.7588218547.

The spelling of 9139276440 in words is "nine billion, one hundred thirty-nine million, two hundred seventy-six thousand, four hundred forty".