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30408947974 = 2191979914099
BaseRepresentation
bin11100010100100000…
…111011100100000110
32220111020210121112101
4130110200323210012
5444234142313344
621545241142314
72124363535666
oct342440734406
986436717471
1030408947974
1111995070769
125a87a8a99a
132b3801a452
14168689c1a6
15bce9a89d4
hex71483b906

30408947974 has 32 divisors (see below), whose sum is σ = 48318336000. Its totient is φ = 14313166560.

The previous prime is 30408947939. The next prime is 30408947981. The reversal of 30408947974 is 47974980403.

It is a congruent number.

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, 7416577 + ... + 7420675.

It is an arithmetic number, because the mean of its divisors is an integer number (1509948000).

Almost surely, 230408947974 is an apocalyptic number.

30408947974 is a deficient number, since it is larger than the sum of its proper divisors (17909388026).

30408947974 is a wasteful number, since it uses less digits than its factorization.

30408947974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 30408947974 in words is "thirty billion, four hundred eight million, nine hundred forty-seven thousand, nine hundred seventy-four".

Divisors: 1 2 19 38 197 394 991 1982 3743 4099 7486 8198 18829 37658 77881 155762 195227 390454 807503 1615006 3709313 4062109 7418626 8124218 15342557 30685114 77180071 154360142 800235473 1600470946 15204473987 30408947974