158377640 has 16 divisors (see below), whose sum is σ = 356349780. Its totient is φ = 63351040.

The previous prime is 158377633. The next prime is 158377663. The reversal of 158377640 is 46773851.

It can be written as a sum of positive squares in 2 ways, for example, as 132388036 + 25989604 = 11506^2 + 5098^2 .

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, 1979681 + ... + 1979760.

Almost surely, 2^158377640 is an apocalyptic number.

158377640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158377640 is an abundant number, since it is smaller than the sum of its proper divisors (197972140).

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

158377640 is a wasteful number, since it uses less digits than its factorization.

158377640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959452 (or 3959448 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 158377640 is about 12584.8178373785. The cubic root of 158377640 is about 541.0423852638.

The spelling of 158377640 in words is "one hundred fifty-eight million, three hundred seventy-seven thousand, six hundred forty".