151420440 has 32 divisors (see below), whose sum is σ = 454261680. Its totient is φ = 40378752.

The previous prime is 151420433. The next prime is 151420447. The reversal of 151420440 is 44024151.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (151420433) and next prime (151420447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151420447) 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, 630799 + ... + 631038.

Almost surely, 2^151420440 is an apocalyptic number.

151420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151420440 is an abundant number, since it is smaller than the sum of its proper divisors (302841240).

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

151420440 is a wasteful number, since it uses less digits than its factorization.

151420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261851 (or 1261847 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 151420440 is about 12305.3012965957. The cubic root of 151420440 is about 533.0011768586.

Adding to 151420440 its reverse (44024151), we get a palindrome (195444591).

It can be divided in two parts, 15 and 1420440, that added together give a triangular number (1420455 = T₁₆₈₅).

The spelling of 151420440 in words is "one hundred fifty-one million, four hundred twenty thousand, four hundred forty".