158020640 has 48 divisors (see below), whose sum is σ = 385378560. Its totient is φ = 61167360.

The previous prime is 158020637. The next prime is 158020693. The reversal of 158020640 is 46020851.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10970 + ... + 20889.

It is an arithmetic number, because the mean of its divisors is an integer number (8028720).

Almost surely, 2^158020640 is an apocalyptic number.

158020640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158020640 is an abundant number, since it is smaller than the sum of its proper divisors (227357920).

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

158020640 is a wasteful number, since it uses less digits than its factorization.

158020640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31905 (or 31897 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 158020640 is about 12570.6260782827. The cubic root of 158020640 is about 540.6355571240.

The spelling of 158020640 in words is "one hundred fifty-eight million, twenty thousand, six hundred forty".