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7490 = 257107
BaseRepresentation
bin1110101000010
3101021102
41311002
5214430
654402
730560
oct16502
911242
107490
11569a
124402
133542
142a30
152345
hex1d42

7490 has 16 divisors (see below), whose sum is σ = 15552. Its totient is φ = 2544.

The previous prime is 7489. The next prime is 7499. The reversal of 7490 is 947.

7490 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a super-2 number, since 2×74902 = 112200200, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 11 and base 15.

It is not an unprimeable number, because it can be changed into a prime (7499) 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, 17 + ... + 123.

It is an arithmetic number, because the mean of its divisors is an integer number (972).

27490 is an apocalyptic number.

7490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7490 is an abundant number, since it is smaller than the sum of its proper divisors (8062).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7776).

7490 is a wasteful number, since it uses less digits than its factorization.

7490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 7490 is about 86.5447860937. The cubic root of 7490 is about 19.5656346306.

The spelling of 7490 in words is "seven thousand, four hundred ninety".

Divisors: 1 2 5 7 10 14 35 70 107 214 535 749 1070 1498 3745 7490