158738640 has 160 divisors (see below), whose sum is σ = 519609600. Its totient is φ = 40009728.

The previous prime is 158738633. The next prime is 158738651. The reversal of 158738640 is 46837851.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 158738592 and 158738601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 822384 + ... + 822576.

It is an arithmetic number, because the mean of its divisors is an integer number (3247560).

Almost surely, 2^158738640 is an apocalyptic number.

158738640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158738640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259804800).

158738640 is an abundant number, since it is smaller than the sum of its proper divisors (360870960).

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

158738640 is a wasteful number, since it uses less digits than its factorization.

158738640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 158738640 is about 12599.1523524402. The cubic root of 158738640 is about 541.4531505079.

The spelling of 158738640 in words is "one hundred fifty-eight million, seven hundred thirty-eight thousand, six hundred forty".