142669890 has 128 divisors (see below), whose sum is σ = 419523840. Its totient is φ = 34499520.

The previous prime is 142669871. The next prime is 142669909. The reversal of 142669890 is 98966241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (142669871) and next prime (142669909).

It is a super-2 number, since 2×142669890² = 40709395025224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 359172 + ... + 359568.

It is an arithmetic number, because the mean of its divisors is an integer number (3277530).

Almost surely, 2^142669890 is an apocalyptic number.

142669890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142669890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209761920).

142669890 is an abundant number, since it is smaller than the sum of its proper divisors (276853950).

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

142669890 is a wasteful number, since it uses less digits than its factorization.

142669890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 142669890 is about 11944.4501757092. The cubic root of 142669890 is about 522.5294535566.

The spelling of 142669890 in words is "one hundred forty-two million, six hundred sixty-nine thousand, eight hundred ninety".