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13988037 = 373121487
BaseRepresentation
bin110101010111…
…000011000101
3222022122222110
4311113003011
512040104122
61215451233
7226616310
oct65270305
928278873
1013988037
117994468
124826b19
132b89b5b
141c01977
15136490c
hexd570c5

13988037 has 16 divisors (see below), whose sum is σ = 22003712. Its totient is φ = 7734960.

The previous prime is 13988033. The next prime is 13988053. The reversal of 13988037 is 73088931.

13988037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13988037 - 22 = 13988033 is a prime.

It is a super-2 number, since 2×139880372 = 391330358226738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13987986 and 13988004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10093 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (1375232).

Almost surely, 213988037 is an apocalyptic number.

It is an amenable number.

13988037 is a deficient number, since it is larger than the sum of its proper divisors (8015675).

13988037 is a wasteful number, since it uses less digits than its factorization.

13988037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21528.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13988037 is about 3740.0584220036. The cubic root of 13988037 is about 240.9455579693.

The spelling of 13988037 in words is "thirteen million, nine hundred eighty-eight thousand, thirty-seven".

Divisors: 1 3 7 21 31 93 217 651 21487 64461 150409 451227 666097 1998291 4662679 13988037