1494578988 has 162 divisors, whose sum is σ = 4640227956. Its totient is φ = 404375328.

The previous prime is 1494578971. The next prime is 1494578989. The reversal of 1494578988 is 8898754941.

1494578988 is a `hidden beast` number, since 1 + 494 + 57 + 8 + 98 + 8 = 666.

It is a super-2 number, since 2×1494578988² = 4467532702742208288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1494578989) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 635631 + ... + 637977.

Almost surely, 2^1494578988 is an apocalyptic number.

1494578988 is a gapful number since it is divisible by the number (18) 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 1494578988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320113978).

1494578988 is an abundant number, since it is smaller than the sum of its proper divisors (3145648968).

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

1494578988 is a wasteful number, since it uses less digits than its factorization.

1494578988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2378 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The square root of 1494578988 is about 38659.7851520155. The cubic root of 1494578988 is about 1143.3335758248. Note that the first 3 decimals are identical.

The spelling of 1494578988 in words is "one billion, four hundred ninety-four million, five hundred seventy-eight thousand, nine hundred eighty-eight".