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72440673 = 31912710007
BaseRepresentation
bin1000101000101…
…01101101100001
312001022100220220
410110111231201
5122021100143
611104353253
71536510204
oct424255541
9161270826
1072440673
1137988828
1220315829
1312014706
14989993b
15655dd83
hex4515b61

72440673 has 16 divisors (see below), whose sum is σ = 102481920. Its totient is φ = 45387216.

The previous prime is 72440663. The next prime is 72440701. The reversal of 72440673 is 37604427.

It is not a de Polignac number, because 72440673 - 26 = 72440609 is a prime.

It is a super-2 number, since 2×724406732 = 10495302209385858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72440603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236 + ... + 12242.

It is an arithmetic number, because the mean of its divisors is an integer number (6405120).

Almost surely, 272440673 is an apocalyptic number.

It is an amenable number.

72440673 is a deficient number, since it is larger than the sum of its proper divisors (30041247).

72440673 is a wasteful number, since it uses less digits than its factorization.

72440673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 72440673 is about 8511.2086685735. The cubic root of 72440673 is about 416.8637766774.

The spelling of 72440673 in words is "seventy-two million, four hundred forty thousand, six hundred seventy-three".

Divisors: 1 3 19 57 127 381 2413 7239 10007 30021 190133 570399 1270889 3812667 24146891 72440673