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70390985 = 572011171
BaseRepresentation
bin1000011001000…
…01010011001001
311220110020021112
410030201103021
5121010002420
610552420105
71513212350
oct414412311
9156406245
1070390985
1136808875
121b6a7635
1311777792
1494c4997
1562a68c5
hex43214c9

70390985 has 8 divisors (see below), whose sum is σ = 96536256. Its totient is φ = 48268080.

The previous prime is 70390981. The next prime is 70390993. The reversal of 70390985 is 58909307.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70390985 - 22 = 70390981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70390981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005551 + ... + 1005620.

It is an arithmetic number, because the mean of its divisors is an integer number (12067032).

Almost surely, 270390985 is an apocalyptic number.

It is an amenable number.

70390985 is a deficient number, since it is larger than the sum of its proper divisors (26145271).

70390985 is a wasteful number, since it uses less digits than its factorization.

70390985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011183.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 70390985 is about 8389.9335515843. The cubic root of 70390985 is about 412.8944204202.

The spelling of 70390985 in words is "seventy million, three hundred ninety thousand, nine hundred eighty-five".

Divisors: 1 5 7 35 2011171 10055855 14078197 70390985