80426640 has 160 divisors (see below), whose sum is σ = 291052800. Its totient is φ = 18364416.

The previous prime is 80426611. The next prime is 80426663. The reversal of 80426640 is 4662408.

80426640 = 303² + 304² + ... + 645².

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 80426598 and 80426607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81832 + ... + 82808.

It is an arithmetic number, because the mean of its divisors is an integer number (1819080).

Almost surely, 2^80426640 is an apocalyptic number.

80426640 is a gapful number since it is divisible by the number (80) 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 80426640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145526400).

80426640 is an abundant number, since it is smaller than the sum of its proper divisors (210626160).

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

80426640 is a wasteful number, since it uses less digits than its factorization.

80426640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 80426640 is about 8968.0900976741. The cubic root of 80426640 is about 431.6515537279.

The spelling of 80426640 in words is "eighty million, four hundred twenty-six thousand, six hundred forty".