Search a number
-
+
57999930 = 2351933331
BaseRepresentation
bin1101110101000…
…0001000111010
311001010200221120
43131100020322
5104321444210
65431050110
71302664002
oct335201072
9131120846
1057999930
112a81522a
1217510936
13c0297b1
1479bb002
15515a270
hex375023a

57999930 has 16 divisors (see below), whose sum is σ = 139199904. Its totient is φ = 15466640.

The previous prime is 57999923. The next prime is 57999941. The reversal of 57999930 is 3999975.

It is a super-3 number, since 3×579999303 (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966636 + ... + 966695.

It is an arithmetic number, because the mean of its divisors is an integer number (8699994).

Almost surely, 257999930 is an apocalyptic number.

57999930 is an abundant number, since it is smaller than the sum of its proper divisors (81199974).

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

57999930 is a wasteful number, since it uses less digits than its factorization.

57999930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933341.

The product of its (nonzero) digits is 688905, while the sum is 51.

The square root of 57999930 is about 7615.7685101374. The cubic root of 57999930 is about 387.0875083378.

The spelling of 57999930 in words is "fifty-seven million, nine hundred ninety-nine thousand, nine hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 1933331 3866662 5799993 9666655 11599986 19333310 28999965 57999930