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72023091 = 37219107241
BaseRepresentation
bin1000100101011…
…11110000110011
312000112011002220
410102233300303
5121414214331
611051412123
71533120600
oct422576063
9160464086
1072023091
1137723018
1220154043
1311bc961a
1497cb6a7
1564ca296
hex44afc33

72023091 has 48 divisors (see below), whose sum is σ = 119180160. Its totient is φ = 38465280.

The previous prime is 72023071. The next prime is 72023093. The reversal of 72023091 is 19032027.

It is not a de Polignac number, because 72023091 - 217 = 71892019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72023093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 298731 + ... + 298971.

It is an arithmetic number, because the mean of its divisors is an integer number (2482920).

Almost surely, 272023091 is an apocalyptic number.

72023091 is a deficient number, since it is larger than the sum of its proper divisors (47157069).

72023091 is a wasteful number, since it uses less digits than its factorization.

72023091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 72023091 is about 8486.6419153868. The cubic root of 72023091 is about 416.0612332046.

The spelling of 72023091 in words is "seventy-two million, twenty-three thousand, ninety-one".

Divisors: 1 3 7 19 21 49 57 107 133 147 241 321 399 723 749 931 1687 2033 2247 2793 4579 5061 5243 6099 11809 13737 14231 15729 25787 32053 35427 42693 77361 96159 99617 180509 224371 298851 489953 541527 673113 1263563 1469859 3429671 3790689 10289013 24007697 72023091