164377728 has 64 divisors (see below), whose sum is σ = 485152800. Its totient is φ = 54791424.

The previous prime is 164377727. The next prime is 164377729. The reversal of 164377728 is 827773461.

It is an interprime number because it is at equal distance from previous prime (164377727) and next prime (164377729).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (164377727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20326 + ... + 27237.

Almost surely, 2^164377728 is an apocalyptic number.

164377728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164377728 is an abundant number, since it is smaller than the sum of its proper divisors (320775072).

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

164377728 is an equidigital number, since it uses as much as digits as its factorization.

164377728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47586 (or 47568 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 164377728 is about 12820.9877934580. The cubic root of 164377728 is about 547.7902832955.

The spelling of 164377728 in words is "one hundred sixty-four million, three hundred seventy-seven thousand, seven hundred twenty-eight".