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72989259870 = 2352983895701
BaseRepresentation
bin100001111111001111…
…1111011100001011110
320222101202011120112010
41003332133323201132
52143440222303440
653310353052050
75162512321002
oct1037637734136
9228352146463
1072989259870
1128a5559727a
121218bb57026
136b6283b487
143765a24702
151d72c82580
hex10fe7fb85e

72989259870 has 32 divisors (see below), whose sum is σ = 181214716320. Its totient is φ = 18792636800.

The previous prime is 72989259869. The next prime is 72989259877. The reversal of 72989259870 is 7895298927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72989259877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41946981 + ... + 41948720.

It is an arithmetic number, because the mean of its divisors is an integer number (5662959885).

Almost surely, 272989259870 is an apocalyptic number.

72989259870 is an abundant number, since it is smaller than the sum of its proper divisors (108225456450).

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

72989259870 is a wasteful number, since it uses less digits than its factorization.

72989259870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83895740.

The product of its (nonzero) digits is 45722880, while the sum is 66.

The spelling of 72989259870 in words is "seventy-two billion, nine hundred eighty-nine million, two hundred fifty-nine thousand, eight hundred seventy".

Divisors: 1 2 3 5 6 10 15 29 30 58 87 145 174 290 435 870 83895701 167791402 251687103 419478505 503374206 838957010 1258435515 2432975329 2516871030 4865950658 7298925987 12164876645 14597851974 24329753290 36494629935 72989259870