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72490 = 2511659
BaseRepresentation
bin10001101100101010
310200102211
4101230222
54304430
61315334
7421225
oct215452
9120384
1072490
114a510
1235b4a
1326cc2
141c5bc
151672a
hex11b2a

72490 has 16 divisors (see below), whose sum is σ = 142560. Its totient is φ = 26320.

The previous prime is 72481. The next prime is 72493. The reversal of 72490 is 9427.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (72493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 439.

It is an arithmetic number, because the mean of its divisors is an integer number (8910).

272490 is an apocalyptic number.

72490 is the 220-th pentagonal number.

72490 is a deficient number, since it is larger than the sum of its proper divisors (70070).

72490 is a wasteful number, since it uses less digits than its factorization.

72490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 72490 is about 269.2396701825. The cubic root of 72490 is about 41.6958373507.

The spelling of 72490 in words is "seventy-two thousand, four hundred ninety".

Divisors: 1 2 5 10 11 22 55 110 659 1318 3295 6590 7249 14498 36245 72490