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72542490 = 2352418083
BaseRepresentation
bin1000101001011…
…10100100011010
312001111112120220
410110232210122
5122032324430
611110500510
71540413066
oct424564432
9161445526
1072542490
1137a48279
1220364736
131204bb67
1498c4aa6
15657e110
hex452e91a

72542490 has 16 divisors (see below), whose sum is σ = 174102048. Its totient is φ = 19344656.

The previous prime is 72542473. The next prime is 72542521. The reversal of 72542490 is 9424527.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209012 + ... + 1209071.

It is an arithmetic number, because the mean of its divisors is an integer number (10881378).

Almost surely, 272542490 is an apocalyptic number.

72542490 is an abundant number, since it is smaller than the sum of its proper divisors (101559558).

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

72542490 is a wasteful number, since it uses less digits than its factorization.

72542490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418093.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 72542490 is about 8517.1879162080. The cubic root of 72542490 is about 417.0589890614.

The spelling of 72542490 in words is "seventy-two million, five hundred forty-two thousand, four hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 2418083 4836166 7254249 12090415 14508498 24180830 36271245 72542490