72671286 has 16 divisors (see below), whose sum is σ = 145436400. Its totient is φ = 24208128.

The previous prime is 72671267. The next prime is 72671359. The reversal of 72671286 is 68217627.

It is a super-2 number, since 2×72671286² = 10562231617787592, which contains 22 as substring.

It is a Curzon number.

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, 9930 + ... + 15618.

It is an arithmetic number, because the mean of its divisors is an integer number (9089775).

Almost surely, 2^72671286 is an apocalyptic number.

72671286 is an abundant number, since it is smaller than the sum of its proper divisors (72765114).

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

72671286 is a wasteful number, since it uses less digits than its factorization.

72671286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823.

The product of its digits is 56448, while the sum is 39.

The square root of 72671286 is about 8524.7455093979. The cubic root of 72671286 is about 417.3056664272.

It can be divided in two parts, 726 and 71286, that multiplied together give a square (51753636 = 7194²).

The spelling of 72671286 in words is "seventy-two million, six hundred seventy-one thousand, two hundred eighty-six".