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2907980 = 225145399
BaseRepresentation
bin1011000101111101001100
312110201222222
423011331030
51221023410
6142154512
733501035
oct13057514
95421888
102907980
111706899
12b82a38
137aa7ca
14559a8c
153c6955
hex2c5f4c

2907980 has 12 divisors (see below), whose sum is σ = 6106800. Its totient is φ = 1163184.

The previous prime is 2907979. The next prime is 2907997. The reversal of 2907980 is 897092.

It is a self number, because there is not a number n which added to its sum of digits gives 2907980.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72680 + ... + 72719.

It is an arithmetic number, because the mean of its divisors is an integer number (508900).

22907980 is an apocalyptic number.

2907980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2907980 is an abundant number, since it is smaller than the sum of its proper divisors (3198820).

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

2907980 is a wasteful number, since it uses less digits than its factorization.

2907980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145408 (or 145406 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2907980 is about 1705.2800356540. The cubic root of 2907980 is about 142.7349974981.

The spelling of 2907980 in words is "two million, nine hundred seven thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 145399 290798 581596 726995 1453990 2907980