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3720087 = 3127
BaseRepresentation
bin1110001100001110010111
321000000000000
432030032113
51423020322
6211422343
743422510
oct16141627
97000000
103720087
112110a58
1212b49b3
13a03347
146cba07
154d73ac
hex38c397

3720087 has 26 divisors (see below), whose sum is σ = 6377288. Its totient is φ = 2125764.

The previous prime is 3720037. The next prime is 3720103. The reversal of 3720087 is 7800273.

It is not a de Polignac number, because 3720087 - 26 = 3720023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an enlightened number because it begins with the concatenation of its prime factors (37).

3720087 is a lucky number.

It is a nialpdrome in base 3 and base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 3720087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3720037) by changing a digit.

It is a polite number, since it can be written in 25 ways as a sum of consecutive naturals, for example, 531438 + ... + 531444.

Almost surely, 23720087 is an apocalyptic number.

3720087 is a deficient number, since it is larger than the sum of its proper divisors (2657201).

3720087 is an frugal number, since it uses more digits than its factorization.

3720087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 3720087 is about 1928.7527057661. The cubic root of 3720087 is about 154.9474258046.

The spelling of 3720087 in words is "three million, seven hundred twenty thousand, eighty-seven".

Divisors: 1 3 7 9 21 27 63 81 189 243 567 729 1701 2187 5103 6561 15309 19683 45927 59049 137781 177147 413343 531441 1240029 3720087