145231408 has 80 divisors (see below), whose sum is σ = 344977920. Its totient is φ = 57811968.

The previous prime is 145231397. The next prime is 145231409. The reversal of 145231408 is 804132541.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (145231409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157573 + ... + 158491.

It is an arithmetic number, because the mean of its divisors is an integer number (4312224).

Almost surely, 2^145231408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145231408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172488960).

145231408 is an abundant number, since it is smaller than the sum of its proper divisors (199746512).

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

145231408 is a wasteful number, since it uses less digits than its factorization.

145231408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 145231408 is about 12051.1994423792. The cubic root of 145231408 is about 525.6381150894.

Adding to 145231408 its reverse (804132541), we get a palindrome (949363949).

It can be divided in two parts, 14523 and 1408, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 145231408 in words is "one hundred forty-five million, two hundred thirty-one thousand, four hundred eight".