8138740 has 24 divisors (see below), whose sum is σ = 17644032. Its totient is φ = 3150240.

The previous prime is 8138737. The next prime is 8138743. The reversal of 8138740 is 478318.

8138740 = T₃₇₁ + T₃₇₂ + ... + T₄₆₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8138737) and next prime (8138743).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138743) 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, 5944 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (735168).

Almost surely, 2^8138740 is an apocalyptic number.

It is an amenable number.

8138740 is an abundant number, since it is smaller than the sum of its proper divisors (9505292).

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

8138740 is a wasteful number, since it uses less digits than its factorization.

8138740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13167 (or 13165 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8138740 is about 2852.8477001060. The cubic root of 8138740 is about 201.1495467194.

The spelling of 8138740 in words is "eight million, one hundred thirty-eight thousand, seven hundred forty".