690999120 has 320 divisors, whose sum is σ = 2839818240. Its totient is φ = 150999552.

The previous prime is 690999109. The next prime is 690999131. The reversal of 690999120 is 21999096.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (690999109) and next prime (690999131).

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

It is a congruent number.

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, 346767 + ... + 348753.

It is an arithmetic number, because the mean of its divisors is an integer number (8874432).

Almost surely, 2^690999120 is an apocalyptic number.

690999120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690999120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419909120).

690999120 is an abundant number, since it is smaller than the sum of its proper divisors (2148819120).

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

690999120 is a wasteful number, since it uses less digits than its factorization.

690999120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 690999120 is about 26286.8621177956. The cubic root of 690999120 is about 884.0818976423.

The spelling of 690999120 in words is "six hundred ninety million, nine hundred ninety-nine thousand, one hundred twenty".