154215660 has 96 divisors (see below), whose sum is σ = 441987840. Its totient is φ = 40168192.

The previous prime is 154215643. The next prime is 154215661. The reversal of 154215660 is 66512451.

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

It is not an unprimeable number, because it can be changed into a prime (154215661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861451 + ... + 861629.

It is an arithmetic number, because the mean of its divisors is an integer number (4604040).

Almost surely, 2^154215660 is an apocalyptic number.

154215660 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 154215660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220993920).

154215660 is an abundant number, since it is smaller than the sum of its proper divisors (287772180).

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

154215660 is a wasteful number, since it uses less digits than its factorization.

154215660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 154215660 is about 12418.3597950776. The cubic root of 154215660 is about 536.2609323954.

The spelling of 154215660 in words is "one hundred fifty-four million, two hundred fifteen thousand, six hundred sixty".