137528378 has 16 divisors (see below), whose sum is σ = 222958176. Its totient is φ = 63246960.

The previous prime is 137528329. The next prime is 137528393. The reversal of 137528378 is 873825731.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1988 + ... + 16703.

It is an arithmetic number, because the mean of its divisors is an integer number (13934886).

Almost surely, 2^137528378 is an apocalyptic number.

137528378 is a deficient number, since it is larger than the sum of its proper divisors (85429798).

137528378 is a wasteful number, since it uses less digits than its factorization.

137528378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18989.

The product of its digits is 282240, while the sum is 44.

The square root of 137528378 is about 11727.2493791170. The cubic root of 137528378 is about 516.1755632192.

The spelling of 137528378 in words is "one hundred thirty-seven million, five hundred twenty-eight thousand, three hundred seventy-eight".