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380157 = 3126719
BaseRepresentation
bin1011100110011111101
3201022110220
41130303331
544131112
612051553
73142221
oct1346375
9638426
10380157
1123a688
12163bb9
1310405b
149c781
157798c
hex5ccfd

380157 has 4 divisors (see below), whose sum is σ = 506880. Its totient is φ = 253436.

The previous prime is 380147. The next prime is 380179. The reversal of 380157 is 751083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751083 = 3250361.

It is a cyclic number.

It is not a de Polignac number, because 380157 - 24 = 380141 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63357 + ... + 63362.

It is an arithmetic number, because the mean of its divisors is an integer number (126720).

2380157 is an apocalyptic number.

It is an amenable number.

380157 is a deficient number, since it is larger than the sum of its proper divisors (126723).

380157 is a wasteful number, since it uses less digits than its factorization.

380157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126722.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 380157 is about 616.5687309619. The cubic root of 380157 is about 72.4415382852.

It can be divided in two parts, 3 and 80157, that multiplied together give a triangular number (240471 = T693).

The spelling of 380157 in words is "three hundred eighty thousand, one hundred fifty-seven".

Divisors: 1 3 126719 380157