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132471990 = 233572171931
BaseRepresentation
bin1111110010101…
…01110010110110
3100020021021102000
413321111302312
5232403100430
621051200130
73165664500
oct771256266
9306237360
10132471990
1168860192
1238446046
13215a29c1
1413844d70
15b96ae60
hex7e55cb6

132471990 has 384 divisors, whose sum is σ = 472780800. Its totient is φ = 26127360.

The previous prime is 132471923. The next prime is 132472001. The reversal of 132471990 is 99174231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4273275 + ... + 4273305.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2132471990 is an apocalyptic number.

132471990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 132471990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236390400).

132471990 is an abundant number, since it is smaller than the sum of its proper divisors (340308810).

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

132471990 is a wasteful number, since it uses less digits than its factorization.

132471990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 132471990 is about 11509.6476922623. The cubic root of 132471990 is about 509.7704849623.

The spelling of 132471990 in words is "one hundred thirty-two million, four hundred seventy-one thousand, nine hundred ninety".