145951638 has 64 divisors (see below), whose sum is σ = 344383488. Its totient is φ = 40373280.

The previous prime is 145951607. The next prime is 145951651. The reversal of 145951638 is 836159541.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 145951638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210873 + ... + 211563.

It is an arithmetic number, because the mean of its divisors is an integer number (5380992).

Almost surely, 2^145951638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145951638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172191744).

145951638 is an abundant number, since it is smaller than the sum of its proper divisors (198431850).

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

145951638 is a wasteful number, since it uses less digits than its factorization.

145951638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857.

The product of its digits is 129600, while the sum is 42.

The square root of 145951638 is about 12081.0445740424. The cubic root of 145951638 is about 526.5055955841.

The spelling of 145951638 in words is "one hundred forty-five million, nine hundred fifty-one thousand, six hundred thirty-eight".