150621690 has 64 divisors (see below), whose sum is σ = 376358400. Its totient is φ = 38547264.

The previous prime is 150621673. The next prime is 150621719. The reversal of 150621690 is 96126051.

It is a super-2 number, since 2×150621690² = 45373786996912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75121 + ... + 77099.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^150621690 is an apocalyptic number.

150621690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 150621690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188179200).

150621690 is an abundant number, since it is smaller than the sum of its proper divisors (225736710).

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

150621690 is a wasteful number, since it uses less digits than its factorization.

150621690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 150621690 is about 12272.8028583531. The cubic root of 150621690 is about 532.0623219242.

The spelling of 150621690 in words is "one hundred fifty million, six hundred twenty-one thousand, six hundred ninety".