7886156040 has 288 divisors, whose sum is σ = 30197232000. Its totient is φ = 1779418368.

The previous prime is 7886155973. The next prime is 7886156077. The reversal of 7886156040 is 406516887.

It is a happy number.

7886156040 is a `hidden beast` number, since 7 + 8 + 86 + 1 + 560 + 4 + 0 = 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1390731 + ... + 1396389.

It is an arithmetic number, because the mean of its divisors is an integer number (104851500).

Almost surely, 2^7886156040 is an apocalyptic number.

7886156040 is a gapful number since it is divisible by the number (70) 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 7886156040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15098616000).

7886156040 is an abundant number, since it is smaller than the sum of its proper divisors (22311075960).

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

7886156040 is a wasteful number, since it uses less digits than its factorization.

7886156040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769 (or 5755 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 7886156040 is about 88804.0316652347. The cubic root of 7886156040 is about 1990.4676425950.

The spelling of 7886156040 in words is "seven billion, eight hundred eighty-six million, one hundred fifty-six thousand, forty".