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99940640 = 255709881
BaseRepresentation
bin1011111010011…
…11100100100000
320222001111210012
411331033210200
5201041100030
613530024052
72322324062
oct575174440
9228044705
1099940640
1151460978
1229578028
1317922797
14d3b7732
158b92095
hex5f4f920

99940640 has 48 divisors (see below), whose sum is σ = 236711160. Its totient is φ = 39874560.

The previous prime is 99940639. The next prime is 99940693. The reversal of 99940640 is 4604999.

It can be written as a sum of positive squares in 4 ways, for example, as 43930384 + 56010256 = 6628^2 + 7484^2 .

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, 113000 + ... + 113880.

Almost surely, 299940640 is an apocalyptic number.

It is an amenable number.

99940640 is an abundant number, since it is smaller than the sum of its proper divisors (136770520).

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

99940640 is a wasteful number, since it uses less digits than its factorization.

99940640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 99940640 is about 9997.0315594180. The cubic root of 99940640 is about 464.0670236118.

The spelling of 99940640 in words is "ninety-nine million, nine hundred forty thousand, six hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 709 881 1418 1762 2836 3524 3545 4405 5672 7048 7090 8810 11344 14096 14180 17620 22688 28192 28360 35240 56720 70480 113440 140960 624629 1249258 2498516 3123145 4997032 6246290 9994064 12492580 19988128 24985160 49970320 99940640