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57788940 = 22351187559
BaseRepresentation
bin1101110001110…
…0101000001100
311000201222112010
43130130220030
5104243221230
65422341220
71301124606
oct334345014
9130658463
1057788940
112a690760
121742a810
13bc84751
147964176
1551179b0
hex371ca0c

57788940 has 48 divisors (see below), whose sum is σ = 176520960. Its totient is φ = 14009280.

The previous prime is 57788923. The next prime is 57788953. The reversal of 57788940 is 4988775.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 57788940.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43120 + ... + 44439.

It is an arithmetic number, because the mean of its divisors is an integer number (3677520).

Almost surely, 257788940 is an apocalyptic number.

It is an amenable number.

57788940 is an abundant number, since it is smaller than the sum of its proper divisors (118732020).

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

57788940 is a wasteful number, since it uses less digits than its factorization.

57788940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87582 (or 87580 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 57788940 is about 7601.9037089403. The cubic root of 57788940 is about 386.6175604834.

The spelling of 57788940 in words is "fifty-seven million, seven hundred eighty-eight thousand, nine hundred forty".