147621540 has 192 divisors, whose sum is σ = 487710720. Its totient is φ = 32962560.

The previous prime is 147621517. The next prime is 147621553. The reversal of 147621540 is 45126741.

147621540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 147621498 and 147621507.

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 63 ways as a sum of consecutive naturals, for example, 661869 + ... + 662091.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^147621540 is an apocalyptic number.

147621540 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 147621540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243855360).

147621540 is an abundant number, since it is smaller than the sum of its proper divisors (340089180).

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

147621540 is a wasteful number, since it uses less digits than its factorization.

147621540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 147621540 is about 12149.9604937629. The cubic root of 147621540 is about 528.5059859150.

The spelling of 147621540 in words is "one hundred forty-seven million, six hundred twenty-one thousand, five hundred forty".