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87401480 = 2352185037
BaseRepresentation
bin1010011010110…
…10010000001000
320002110110021212
411031122100020
5134333321410
612401152252
72110620545
oct515322010
9202413255
1087401480
1145377031
122532b688
131515226a
14b871bcc
157a16b05
hex535a408

87401480 has 16 divisors (see below), whose sum is σ = 196653420. Its totient is φ = 34960576.

The previous prime is 87401477. The next prime is 87401491. The reversal of 87401480 is 8410478.

It can be written as a sum of positive squares in 2 ways, for example, as 86452804 + 948676 = 9298^2 + 974^2 .

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, 1092479 + ... + 1092558.

Almost surely, 287401480 is an apocalyptic number.

It is an amenable number.

87401480 is an abundant number, since it is smaller than the sum of its proper divisors (109251940).

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

87401480 is a wasteful number, since it uses less digits than its factorization.

87401480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185048 (or 2185044 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 87401480 is about 9348.8758682528. The cubic root of 87401480 is about 443.7853167686.

The spelling of 87401480 in words is "eighty-seven million, four hundred one thousand, four hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 2185037 4370074 8740148 10925185 17480296 21850370 43700740 87401480