72051280 has 40 divisors (see below), whose sum is σ = 191452032. Its totient is φ = 24703104.

The previous prime is 72051277. The next prime is 72051293. The reversal of 72051280 is 8215027.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63772 + ... + 64891.

Almost surely, 2^72051280 is an apocalyptic number.

72051280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72051280 is an abundant number, since it is smaller than the sum of its proper divisors (119400752).

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

72051280 is a wasteful number, since it uses less digits than its factorization.

72051280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128683 (or 128677 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 72051280 is about 8488.3025393774. The cubic root of 72051280 is about 416.1155066335.

The spelling of 72051280 in words is "seventy-two million, fifty-one thousand, two hundred eighty".