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1393938688 = 285445073
BaseRepresentation
bin101001100010101…
…1101000100000000
310121010221102101211
41103011131010000
510323322014223
6350152535504
746354166122
oct12305350400
93533842354
101393938688
1165592984a
1232a9b1594
13192a388bc
14d31b5212
1582598d0d
hex5315d100

1393938688 has 18 divisors (see below), whose sum is σ = 2782432814. Its totient is φ = 696969216.

The previous prime is 1393938659. The next prime is 1393938691. The reversal of 1393938688 is 8868393931.

It can be written as a sum of positive squares in only one way, i.e., 1258262784 + 135675904 = 35472^2 + 11648^2 .

It is a super-2 number, since 2×13939386882 = 3886130131806322688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2722281 + ... + 2722792.

Almost surely, 21393938688 is an apocalyptic number.

It is an amenable number.

1393938688 is a deficient number, since it is larger than the sum of its proper divisors (1388494126).

1393938688 is an frugal number, since it uses more digits than its factorization.

1393938688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5445089 (or 5445075 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 58.

The square root of 1393938688 is about 37335.4883187565. The cubic root of 1393938688 is about 1117.0721487369.

The spelling of 1393938688 in words is "one billion, three hundred ninety-three million, nine hundred thirty-eight thousand, six hundred eighty-eight".

Divisors: 1 2 4 8 16 32 64 128 256 5445073 10890146 21780292 43560584 87121168 174242336 348484672 696969344 1393938688