7490161840 has 80 divisors (see below), whose sum is σ = 19955508480. Its totient is φ = 2561207040.

The previous prime is 7490161831. The next prime is 7490161883. The reversal of 7490161840 is 481610947.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7490161840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 7490161793 and 7490161802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194595 + ... + 229885.

It is an arithmetic number, because the mean of its divisors is an integer number (249443856).

Almost surely, 2^7490161840 is an apocalyptic number.

7490161840 is a gapful number since it is divisible by the number (70) 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 7490161840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9977754240).

7490161840 is an abundant number, since it is smaller than the sum of its proper divisors (12465346640).

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

7490161840 is a wasteful number, since it uses less digits than its factorization.

7490161840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35690 (or 35684 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 7490161840 is about 86545.7210958462. The cubic root of 7490161840 is about 1956.5775550889.

The spelling of 7490161840 in words is "seven billion, four hundred ninety million, one hundred sixty-one thousand, eight hundred forty".