158421340 has 48 divisors (see below), whose sum is σ = 414779904. Its totient is φ = 49377600.

The previous prime is 158421323. The next prime is 158421371. The reversal of 158421340 is 43124851.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 158421299 and 158421308.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49896 + ... + 52975.

It is an arithmetic number, because the mean of its divisors is an integer number (8641248).

Almost surely, 2^158421340 is an apocalyptic number.

158421340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158421340 is an abundant number, since it is smaller than the sum of its proper divisors (256358564).

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

158421340 is a wasteful number, since it uses less digits than its factorization.

158421340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102898 (or 102896 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 158421340 is about 12586.5539366421. The cubic root of 158421340 is about 541.0921426622.

The spelling of 158421340 in words is "one hundred fifty-eight million, four hundred twenty-one thousand, three hundred forty".