80156440 has 192 divisors, whose sum is σ = 238109760. Its totient is φ = 23639040.

The previous prime is 80156423. The next prime is 80156441. The reversal of 80156440 is 4465108.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 80156399 and 80156408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80156441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1314010 + ... + 1314070.

It is an arithmetic number, because the mean of its divisors is an integer number (1240155).

Almost surely, 2^80156440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80156440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119054880).

80156440 is an abundant number, since it is smaller than the sum of its proper divisors (157953320).

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

80156440 is a wasteful number, since it uses less digits than its factorization.

80156440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 80156440 is about 8953.0129006944. The cubic root of 80156440 is about 431.1676215960.

It can be divided in two parts, 80 and 156440, that added together give a triangular number (156520 = T₅₅₉).

The spelling of 80156440 in words is "eighty million, one hundred fifty-six thousand, four hundred forty".