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30703057 = 721156963
BaseRepresentation
bin111010100011…
…1110111010001
32010202212200021
41311013313101
530324444212
63014023441
7521654200
oct165076721
963685607
1030703057
1116370730
12a347b81
13648ccb8
144113237
152a67307
hex1d47dd1

30703057 has 12 divisors (see below), whose sum is σ = 38963376. Its totient is φ = 23924040.

The previous prime is 30703033. The next prime is 30703067. The reversal of 30703057 is 75030703.

It is not a de Polignac number, because 30703057 - 27 = 30702929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30703067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27943 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (3246948).

Almost surely, 230703057 is an apocalyptic number.

It is an amenable number.

30703057 is a deficient number, since it is larger than the sum of its proper divisors (8260319).

30703057 is a wasteful number, since it uses less digits than its factorization.

30703057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56988 (or 56981 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 25.

The square root of 30703057 is about 5541.0339287898. The cubic root of 30703057 is about 313.1318229251.

The spelling of 30703057 in words is "thirty million, seven hundred three thousand, fifty-seven".

Divisors: 1 7 11 49 77 539 56963 398741 626593 2791187 4386151 30703057