Search a number
128392942 = 2173776263
BaseRepresentation
bin1111010011100…
…01111011101110
322221121001000011
413221301323232
5230332033232
620423523434
73116215306
oct751617356
9287531004
10128392942
1166524577
1236bb957a
13207a5172
14130a2606
15b412547
hex7a71eee

128392942 has 8 divisors (see below), whose sum is σ = 203918256. Its totient is φ = 60420192.

The previous prime is 128392939. The next prime is 128392961. The reversal of 128392942 is 249293821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128392895 and 128392904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888098 + ... + 1888165.

It is an arithmetic number, because the mean of its divisors is an integer number (25489782).

Almost surely, 2128392942 is an apocalyptic number.

128392942 is a deficient number, since it is larger than the sum of its proper divisors (75525314).

128392942 is a wasteful number, since it uses less digits than its factorization.

128392942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776282.

The product of its digits is 62208, while the sum is 40.

The square root of 128392942 is about 11331.0609388530. The cubic root of 128392942 is about 504.4835972027.

The spelling of 128392942 in words is "one hundred twenty-eight million, three hundred ninety-two thousand, nine hundred forty-two".